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WebPagetest Forums - overrideHost script function causes increase in Doc Complete

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Full Version: overrideHost script function causes increase in Doc Complete
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When performing tests using the overrideHost header for scripting, it appears that the Doc Complete time increases depending on location that is being used. Two examples below:

https://www.safetydirect.ie/
Slow (Sydney, Australia - EC2 agent) - https://webpagetest.org/result/210212_Di...4eb35f65a/
Normal (Dulles, VA agent) - https://webpagetest.org/result/210212_Di...9704a2131/


https://www.addisonautoplex.com/
Slow (London, UK - EC2 agent) - https://webpagetest.org/result/210212_Di...529ef6463/
Normal (Dulles, VA agent) - https://webpagetest.org/result/210212_Di...8b41b25d6/


(Scripts not used for actual tests, just to verify delay)

Is this a function of how much CPU is given to the VMs running the agents, or is another aspect causing this behavior?
Reference URL's